At intermediate times \(\epsilon \cdot t \approx 2 -80\) , the approach to thermal equilibrium is characterized by a self-similar form of the Schmidt spectrum, see Fig. REF ,

P(t) = - P() ,

where \(\tau \equiv \epsilon \cdot (t-t_0)\)  with scaling exponents \(\alpha = 0.8\pm 0.1\) , \( \beta =0.05\pm 0.03 \) 
and \(\epsilon \cdot t_0 = 1.8 \pm 0.2\) , the error reflecting the systematic uncertainty of our statistical analysis but not finite volume effects, which we believe are significant. Self-similar scaling behavior is characteristic of wave turbulence and universality in classical systems [1]}, consequently we call this phenomenon `quantum turbulence'.
